/Engine/Plugins/Editor/ObjectMixer/ObjectMixer/Source/ObjectMixer/Public/ObjectFilter/ObjectMixerEditorObjectFilter.h
EndUObjectoverrides Return the basic object types you want to filter for in your level. For example, if you want to work with Lights, returnULightComponentBase. If you also want to see the properties for parent or child classes, override the GetObjectMixerPropertyInheritanceInclusionOptions and GetForceAddedColumns functions.
virtual [TSet](API\Runtime\Core\Containers\TSet)< [UClass](API\Runtime\CoreUObject\UObject\UClass) * > GetObjectClassesToFilter() const